Imagine this scenario: You have a steady job as a mid-level manager. Your salary is decent—perhaps ₦250,000 or more consistently hitting your account every month. You see an advert for a car loan or a personal loan, and you apply with confidence. You submit your payslip, your ID, and your bank statement.
Then, the notification comes: “Application Rejected.”
You are confused. You have the income, so why did the bank say you “can’t afford” the loan?
The answer likely isn’t about how much you earn; it’s about how much you already owe. Lenders in Nigeria don’t just look at your credit alert; they look at a secret number called the Debt-to-Income Ratio (DTI). This number tells them the true story of your financial health, and understanding it is the key to unlocking better loan offers.
Keep it simple. Your Debt-to-Income Ratio (DTI) is a percentage that tells lenders how much of your monthly salary is already “eaten” by existing debts before you even wake up in the morning.
It answers one critical question for the bank: After this person pays their current obligations, do they actually have enough cash left to pay us back?
You don’t need to be a chartered accountant to figure this out. The formula is:
Let’s look at a typical Nigerian borrower, Chidi.
Chidi’s Monthly Salary: ₦200,000
Chidi’s Monthly Obligations:
A small loan app repayment: ₦15,000
A staff cooperative contribution/loan: ₦25,000
A monthly rent payment (via a PropTech app): ₦40,000
Total Monthly Debt: ₦80,000
The Calculation:
Chidi’s DTI is 40%.
This means 40% of Chidi’s income is gone before he buys food, fuel, or data. To understand more about how your earnings dictate your borrowing limit, read our guide on how your salary affects your loan amount.
So, is 40% good or bad? Lenders generally use a “traffic light” system to categorize borrowers based on their DTI percentage.
If your DTI is 36% or lower, lenders love you. You are seen as a low-risk borrower who has plenty of disposable income to handle a new loan comfortably.
If you are in this range (like Chidi at 40%), you are acceptable, but lenders will look at you closely. You might still get the loan, but you may not qualify for the maximum amount, or you might be offered a slightly higher interest rate.
If more than 43% of your income goes to debt, you are in the danger zone. Most reputable lenders (banks and top-tier fintechs) will reject your application instantly. They view you as “financially overstretched.”
| Monthly Salary | Total Monthly Debt | DTI % | Lender Decision |
| ₦100,000 | ₦20,000 | 20% | Approved |
| ₦100,000 | ₦40,000 | 40% | Maybe |
| ₦100,000 | ₦60,000 | 60% | Rejected |
Note on Rent:
In Nigeria, because we traditionally pay rent annually upfront, some lenders might not count it as a “monthly debt” in the strict sense, but they will deduct it from your disposable income calculation. However, if you pay monthly rent (like with some modern PropTech apps or a rent loan), it absolutely counts toward your DTI!
You might think, “I can manage my money, why are they worried?”
Lenders care about safety. Your DTI is a measure of your financial flexibility.
If your DTI is high (e.g., 50%), you have very little wiggle room. If you have a small emergency—your car breaks down, or the price of fuel goes up—you might not have enough cash left to survive. When survival is at stake, the first thing people stop paying is their loan. A high DTI tells a lender that you are one small emergency away from defaulting.
While your DTI measures your capacity to pay, remember that they also check your history. Understanding what is a credit score in Nigeria helps you see the other half of the approval puzzle.
If you calculated your DTI and realized you are in the “Red Zone,” don’t panic. You can fix this.
This is the fastest way to lower your ratio. You need to eliminate some of those monthly obligations. Use the Snowball vs. Avalanche method to aggressively clear the smaller debts (like that ₦15,000 loan app balance). Once that monthly payment is gone, your DTI drops immediately.
DTI is a ratio. If you can’t lower the debt (numerator), you must increase the income (denominator). If you have a side hustle, ensure the income is passing through your bank account so it can be documented and counted by lenders.
Stop taking on new obligations. Don’t sign up for a new BNPL plan for a phone while you are trying to qualify for a larger loan. Learn to manage your debt effectively by living within your current means until your ratio improves.
Applying for a loan is a serious financial move. Don’t just hope for the best. Before you submit that application, sit down and do the math.
If your DTI is high, it might be better to wait a few months, clear a small debt, and improve your ratio. By understanding the numbers lenders watch, you stop being a passive applicant and become a smart, empowered borrower who knows exactly how to get a “Yes.”
No, they are two separate metrics. Your Credit Score measures your past behaviour (do you pay on time?). Your DTI measures your current capacity (can you afford a new payment?). You can have a perfect credit score but still be rejected if your DTI is too high.
It is very difficult to get a loan from a reputable bank or regulated fintech with a DTI that high. You might find predatory lenders (loan sharks) who will lend to you, but they will charge exorbitant interest rates because they know you are high-risk. It is safer to avoid them.
Generally, no. In Nigeria, personal loans are assessed based on the individual applicant’s income. Your spouse’s income will only count if you are applying for a joint loan or if they are standing as a guarantor/co-signer for you.
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